M-91 has its northern terminus in Cato Township and leads south to Greenville.

As of the census[3] of 2000, there were 2,920 people, 1,073 households, and 789 families residing in the township.

There were 1,307 housing units at an average density of 37.1 per square mile (14.3/km2).

The racial makeup of the township was 96.71% White, 0.17% African American, 0.41% Native American, 0.27% Asian, 0.07% Pacific Islander, 0.65% from other races, and 1.71% from two or more races.

22.2% of all households were made up of individuals, and 11.3% had someone living alone who was 65 years of age or older.